-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday 23 April 2004 10:25 pm, Robert Wipfel wrote: > Oracle since around verison 8.x has its own built-in DLM (not unlike > openDLM) for managing shared access to the database blocks of database > tables stored in tablespaces stored in OS files or raw partitions. Pre > version 8.x the h/w vendor had to provide the DLM and for IBM's > clusters, they shipped what became openDLM. Then Oracle sucked their own > DLM into the core database and made it a standard. I just wasn't sure if they dropped back to fs based locking if it was available. I guess you answered my question. > > Oracle does direct IO to OS files. Best not to get in Oracle's way. The > benefit of ocfs is that it gives a file system name to otherwise raw > partitions and so simplifies management of the database's data by > supplying a modified fileutils package that supports normal file like > management of the database files. But ocfs is not a general purpose > cluster file system and can't be used for executable or config files > located in ORACLE_HOME for example. For that you'd want to use a real > Posix cluster file system. > > How many nodes will openGFS run on now? Depends. With memexp: I think the limit is 32, but afaik, it's only ever been tested with 16. With OpenDLM: using the old heartbeat membership: 2 using heartbeat's newer ccm: Unknown (there is an arbitrary limit of 100, don't know how many have been tested in reality) - --Brian > > Thanks, > Robert > <snip> - -- http://www.brianandsara.net For Sale : http://www.brianandsara.net/temp/forsale.php -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFAieyx+cPN+Z7qK9cRAhe1AKCfA7XO7r+wDvJVnxR+QaIWgVy4qQCgsnJB t5Z/I1Kj56ZxeWRE0+uUwsA= =zDQ8 -----END PGP SIGNATURE----- ------------------------------------------------------- This SF.net email is sponsored by: The Robotic Monkeys at ThinkGeek For a limited time only, get FREE Ground shipping on all orders of $35 or more. Hurry up and shop folks, this offer expires April 30th! http://www.thinkgeek.com/freeshipping/?cpg297 _______________________________________________ Opengfs-devel mailing list Opengfs-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/opengfs-devel